The declining trend since 2012 is mainly due to a natural decline in recovery from the fields, as the majority of fields have already produced the bulk of the expected recoverable oil. In addition, these aging fields require more maintenance of wells, pipelines and platforms. This maintenance work often causes a loss or delay in production.
The large decline in production in 2020 is also due to the temporarily shut down of the Tyra field's installations and the nearby satellite fields in September 2019. The shut-down is due to the Tyra field redevelopment project. When production from the Tyra installations resumes in the winter season 2023/24 the oil production will increase.